I think if you are a regular PC user who just owns a printer, keyboard, mouse, USB flash drive, and USB hard drive then most newer full size desktop PCs would have enough ports, but Laptop, Netbooks, Tablets, and other portable computers will not have enough ports.
A lot of devices are also combined into one like these days printers and scanners are combined into 1 device, and only use one USB cable. I think there are some wireless keyboard and mouse which only uses one USB wireless adapter to connect with the PC.
Some tablets don't even have regular USB ports, only mini USB ports. That's the case with mine and I have to use an adapter and a USB hub to connect everything I need sometimes.
My Tablet does not even have USB ports which can connect a keyboard, mouse, flash drive and other USB devices. It can only connect to my computer to run in disk mode to copy and paste files to and from my Tablet to my PC.
But, it is a cheaper tablet, so I don't really mind since I did not pay much for it, and it has a MicroSD card reader slot which can accept a MicroSD card up to 32GB.
Hopefully my next Tablet will have full size USB port for plugging in a Keyboard, mouse, USB Flash drive, and other USB devices without an adapter.
I think USB and USB devices will be the next big thing for tablets since Tablets have fewer features then a desktop, and laptop, but USB can do a lot of useful things like connect more storage, a printer, speakers, and charge smaller devices like cell phones.
Honestly, I wish that Samsung had gone with the mini USB like my SGS2. It was beyond idiotic for them to use a proprietary connector with the Galaxy 7 Plus.
I agree, I could of got a better tablet if I shop online but I live in Canada where the in-store selection is not very good compared to the US with the Amazon Kindle Fire, Barnes and Noble Nook Tablet, and I didn't want to go online to buy a tablet since it is harder to exchange stuff if it breaks. I also bought my Tablet in early 2012. The selection is not as good at the beggining of the year as today for 199.99 with the Google Nexus 7 inch tablet. I think the Google Nexus 7 is the only fast tablet at under 200 dollars for the 8GB version in Canada.
I also got in on sale for 179.99, so I saved 20 dollars.
Buying online is pretty safe is you do it properly. I recently bought a phone using paypal. There was a problem with the screen, I opened a dispute via paypal. Got a refund and I had a friend repair it for me at no cost